Link Checker now sends Contentful-Link-Checker/1.0 as part of its User-Agent header when it checks URLs. Previously it sent ContentfulLinkChecker/1.0.

Some web application firewalls block requests whose User-Agent contains LinkChecker. Those sites return 403 or 404 errors for links that load correctly in a browser. With the new User-Agent, Link Checker reports the correct status for these sites. The next scan uses the new User-Agent, so you don't need to do anything.

If your firewall or bot protection explicitly allows requests from ContentfulLinkChecker, update the rule to match Contentful-Link-Checker as well. Otherwise, Link Checker may report your own links as broken.

Link Checker also writes the HTTP status of each checked URL to its App Function logs. You can retrieve these logs with the Content Management API.